Vulnerability Description
For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-super) Zabbix administrator leaks data for hosts they do not have access to. A fix has been released that makes the built in Zabbix JavaScript objects read-only, but please be advised that usage of global JavaScript variables is not recommended because their content could be leaked. More information <a href='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'>in Zabbix documentation</a>.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-23919?
CVE-2026-23919 is a documented vulnerability. For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-s...
How severe is CVE-2026-23919?
CVSS scoring is not yet available for CVE-2026-23919. Check NVD for updates.
Is there a patch for CVE-2026-23919?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.